57 research outputs found
Dielectric relaxation of DNA aqueous solutions
We report on a detailed characterization of complex dielectric response of
Na-DNA aqueous solutions by means of low-frequency dielectric spectroscopy (40
Hz - 110 MHz). Results reveal two broad relaxation modes of strength
20<\Delta\epsilon_LF<100 and 5<\Delta\epsilon_HF<20, centered at 0.5
kHz<\nu_LF<70 kHz and 0.1 MHz<\nu_HF<15 MHz. The characteristic length scale of
the LF process, 50<L_LF<750nm, scales with DNA concentration as
c_DNA^{-0.29\pm0.04} and is independent of the ionic strength in the low added
salt regime. Conversely, the measured length scale of the LF process does not
vary with DNA concentration but depends on the ionic strength of the added salt
as I_s^{-1} in the high added salt regime. On the other hand, the
characteristic length scale of the HF process, 3<L_HF<50 nm, varyes with DNA
concentration as c_DNA^{-0.5} for intermediate and large DNA concentrations. At
low DNA concentrations and in the low added salt limit the characteristic
length scale of the HF process scales as c_DNA^{-0.33}. We put these results in
perspective regarding the integrity of the double stranded form of DNA at low
salt conditions as well as regarding the role of different types of counterions
in different regimes of dielectric dispersion. We argue that the free DNA
counterions are primarily active in the HF relaxation, while the condensed
counterions play a role only in the LF relaxation. We also suggest theoretical
interpretations for all these length scales in the whole regime of DNA and salt
concentrations and discuss their ramifications and limitations.Comment: 15 pages, 9 figure
The Croatian Health Survey ā Patient\u27s Satisfaction with Medical Service in Primary Health Care in Croatia
The aim of the study was to investigate patient satisfaction with nurses and general
practice organization in Croatia. A total of 2,252 patients 18 years of age and over from
47 randomly selected general practices were included in the study. 72.1% of patients
were satisfied with nurses and general practice organization. Older and less educated
patients were generally more satisfied. Patients were more pleased with nursesā behavior
(81.9%) than with practice organization (62.3%). Factor analysis revealed two underlying
discriminates of patient satisfaction ā Ā»positive attitude towards the nurseĀ«
and Ā»inaccessibility of practiceĀ«. The former discriminate emphasized a great potential
of nursing, which should be taken into consideration in the transformation of health
care system in Croatia
GROWTH AND DEVELOPMENT DYNAMICS OF TERMINAL SPROUT IN PROVENANCE TRIALS OF SILVER FIR (ABIES ALBA MILL.) OF PLANTS IN CROATIA
Jedna od najvrijednijih vrsta ÄetinjaÄa u Hrvatskoj je obiÄna jela (Abies alba Mill.) koja zajedno s bukvom i smrekom raste na približno 150 000 ha Å”uma Like i Gorskoga Kotara na kojima se preborno gospodari. Prva istraživanja uspijevanja razliÄitih provenijencija obiÄne jele u Hrvatskoj zapoÄela su sakupljanjem sjemena u jesen 1994. godine. Sakupljeni su uzorci sjemena iz 18 priznatih i izabranih sjemenskih sastojina u Hrvatskoj i u dvije slovenske sjemenske sastojine, te je osnovan rani test provenijencija u rasadniku Å”umarskog instituta, Jastrebarsko. U svrhu daljnjih istraživanja na podruÄju Uprave Å”uma Podružnica Delnice, Å umarija Fužine, lokalitet BrloÅ”ko, tijekom 2000. godine i u rasadniku Instituta 2001. godine osnovani su poljski pokusi. U radu su prikazani rezultati istraživanja rasta terminalnog izbojka biljaka starosti osam godina. ProsjeÄni prirast biljaka u pokusu "A-polje" u 2002. iznosio je 45,1 mm, a na pokusu provenijencija "BrloÅ”ko" 156,8 mm. Analizom varijance utvrÄeno je postojanje statistiÄki znaÄajnih razlika izmeÄu provenijencija u dinamici njihova rasta.One of the most valuable conifer tree species in Croatia is Silver fir (Abies alba Mill.). Growing mostly in Lika and Gorski kotar region in pure or mixed with beech and spruce stands it covers area of approximately 150 000 ha, managed using tree selection system. First research on growth of different provenances of silver fir in Croatia begun with seed collection in the autumn of 1994. Collected were seeds from 18 Recognized Seed Stands in Croatia and two from Slovenia and an early provenance test was established in the nursery of Forest Research Institute. Further research involved establishment of field trial in the year 2000 at the locality BrloÅ”ko on the territory of Forest Management Unit Delnice, Forestry Office Fužine, and in the year 2001 on the Forest Research Institute in Jastrebarsko. In this paper we present results of the research of growth of terminal sprout on fir seedlings aged eight years. Average height increment in the year 2002 for the plants in "A-Field" provenance trial was 45.1 mm, while for the provenance trial "BrloÅ”ko" average height increment
amounted to 156.8 mm. Analysis of variance showed that statistically significant difference exists in growth dynamics of different provenances
Ventilatory capacity and intradermal skin tests in cotton workers
KroniÄni respiratorni simptomi, respiratorne bolesti, ventilacijske funkcije i alergijski kožni testovi promatrani su u skupini od 112 radnika zaposlenih u preradi pamuka. UÄestalost pojave kroniÄnih respiratornih simptoma i bolesti bila je veÄa u eksponiranih nego u radnika kontrolne skupine premda su razlike bile statistiÄki znaÄajne samo za kroniÄni kaÅ”alj, katar nosa i bisinozu u žena te za kroniÄni kaÅ”alj, kroniÄni iskaÅ”ljaj i bisinozu u muÅ”karaca. Bisinoza je registrirana u sliÄnoj prevalenciji u žena (29,4%) i u muÅ”karaca (29,5%). U ispitivanih tekstilnih radnika pretežno se radilo o bisinozi stupnja 1/2 (žene 22,1 %, muÅ”karci 20,5%). Rezultati ventilacijskih testova pokazuju tijekom radne smjene statistiÄki znaÄajne akutne redukcije forsiranog vitalnog kapaciteta (FVK) i forsiranog ekspiratornog volumena u prvoj sekundi (FEV1). U muÅ”karaca su utvrÄene neÅ”to niže izmjerene vrijednosti testova u odnosu na normalne oÄekivane vrijednosti. Mali broj radnika reagirao je na alergen pamuka (eksponirani 8,2%, kontrola 1,8%). NaÅ”i rezultati pokazuju da ekspozicija praÅ”ini pamuka može dovesti do pojave respiratornih simptoma i bolesti te do akutnih promjena funkcionalnih testova ventilacije, ali bez alergijske reakcije.Ventilatory capacity, chronic respiratory symptoms and respiratory diseases as well as intradermal skin tests were registered in a group of 112 cotton workers. The prevalence of chronic respiratory symptoms and respiratory diseases was higher among the exposed than among control workers although the differences were statistically significant only for chronic cough, nasal catarrh and byssinosis in women and for chronic cough, chronic phlegm and byssinosis in men. A similar prevalence of byssinosis was noted in women (29.4%) and in men (29.5%). Among textile workers mostly byssinosis grade 1/2 was found (women 22.l %, men 20.5%). There were statistically significant acute reductions over work shift for forced vital capacity (FVC) and one-second forced expiratory volume (FEV1). In men the values were somewhat lower than the expected normal values. A very small number of workers demonstrated positive intradermal skin tests to cotton allergen (exposed 8.2%, control 1.8%). Our data indicate that exposure to cotton dust may lead to the development of respiratory symptoms and diseases as well as to acute changes in ventilatory capacity but without an allergic reaction
Genealogical Structuring of a Population
The study observed population of 484 generation restrictive genealogies collected in
four Croatian regions during 1970/71 within Ā»The study of fat and carbohydrate metabolism
indicators correlated with the occurrence of diabetes in animal fat and oil consuming
population groupsĀ«. The genealogies were collected on two islands (Bra~ and
Hvar) and in two continental regions (Sinjska Krajina and Srijem). Genealogy Structure
Index (GSI) was defined as quantitative indicator of genealogy structure. GSI was
continuos variable which, by its extreme, describes vertical and horizontal type of genealogy
structure, independently of the way genealogies were collected. Genealogy structure
of surveyed population was described on the basis of participation of different genealogy
types. Populations of the island Hvar and Bra~ showed to have horizontal genealogy
type, continental population of Sinjska Krajina showed to have mixed type and
continental population of Srijem showed to have vertical type of genealogy structure
The genetic structure and sustainability of autochthonous cattle breeds in Croatia
Prepoznavanje i potvrÄivanje autohtonosti pasmine temeljna je odrednica u njenom oÄuvanju, buduÄi da se na njoj temelji kontinuitet logike uzgojnog rada kojim se gubitak genetske osobitosti nastoji svesti na najmanju mjeru. Razložno je Äiniti redoviti osvrt na minuli uzgojni rad na autohtonim pasminama kako bi uoÄili manjkavosti u pogledu genetske ali i ekonomske održivosti. Analizirano je stanje genetske strukture i održivosti dvaju hrvatskih autohtonih pasmina goveda koje su viÅ”e od desetljeÄa u žiži znanstvenog i Å”ireg interesa. Istarsko govedo samo je dijelom konsolidirano u genetskom pogledu, uz joÅ” uvijek nejasnu uzgojnu strategiju u pogledu dostupnih linija i majÄinskih rodova. Procijenjena razina uzgoj u srodstvu istarskog goveda na temelju rodoslovlja umjerene je razine (0,0175), no broj i distribucija linija ukazuju na potrebu pažljivije provedbe uzgojnog programa. Razina uzgoja u srodstvu (izraÄunata na temelju rodoslovlja) slavonsko srijemskog podolca (0,0186) ukazuje na sustavan selekcijski rad, no brojno stanje populacije i distribucija grla ukazuju na postojeÄu ozbiljnost situacije. UzgajivaÄima nezadovoljavajuÄa visina novÄanih poticaja, uz nerazvijene programe gospodarskog koriÅ”tenja, dovode u pitanje i fiziÄku održivost populacije u aktivnom in situ programu oÄuvanja.Recognizing and affirmation of autochthonism are basic points protection breeds, whereas is ground of continuity of breeding work which loss genetic rarity reduces to minimum. Necessary is seems the routine overview over the breeding work on autochthonous breeds in order to notice inadequacies in view of genetic and also economic sustainability. Has been analyzed genetic structure and sustainability of two autochthonous cattle breeds which are more than decades in center scientific and wider interest. The Istrian cattle has been partly consolidated in the genetic sight, beside still is unclear breeding strategy with regard to the accessible lineages. Has been estimated the level inbreeding of Istrian cattle on the basis of pedigree data is moderate level (0,0175), but the number and distribution of lineages suggest the needs of more careful implementation breeding program. Levels of inbreeding (calculated on the basis of pedigree) Slavonian syrmian podolian cattle (0,0186) points to the systematic selection work, but numerical situation of populations and distribution of herds suggest on the existing seriousness situations. Breeders unsatisfactory heights of financial stimulus, by undeveloped programs of economic use, call in question too physical sustainability populations the in situ program preservations
Breeding systematization of autochthonous horse breed Croatia posavac
Hrvatski posavac je autohtona pasmina konja. Uzgojno podruÄje je prostor SisaÄko-moslavaÄke i dijelom ZagrebaÄke županije. U cilju dobivanja viÅ”e podataka o uzgoju kako bi se uzgojni program Å”to uspjeÅ”nije provodio u 2004. godini zapoÄeta je sistematizacija uzgoja hrvatskog posavca. U formiranje rodova u obzir su uzeta iskljuÄivo umatiÄena (žigovana) ženska grla. Rezultat sistematizacije je formiranje 726 rodova kobila s velikom varijacijom u broju kobila prema rodu (2 do 37). Brojno najveÄi rod kobila s 37 grla je P97, dok je Äak 265 rodova brojilo samo 2 kobile. ProsjeÄna veliÄina progenih grupa umatiÄenih kobila prema pastuhu iznosila je 9,4 s rasponom varijacije od 1 do 61 kobile kÄerke. Kao oÄevi umatiÄenih kobila pojavljuju se 484 pastuha, od kojih je 228 umatiÄenih (20%) a 256 pastuha oÄeva poznato je samo po imenu (22%). Bez poznatog porijekla po oÄevoj strani umatiÄeno je 655 kobila (58 %).Croatian posavac is autochthonous horse breed. Breeding area is the area of the SisaÄko-moslavaÄka county and a part of ZagrebaÄka county. With a goal of getting more data about breeding so that the breeding program would be successfully conducted, in 2004 the breeding systematization of autochthonous horse breed Croatian posavac has begun. In the line forming, only registered females were taken into consideration. The result of systematization is forming of 726 female lines with great variation in the numbers of mares by the line (2 to 37). Numerously biggest mare line with 37 heads is P97, while even 265 lines counts only 2 mares. The average size of progeny groups of registrated mares by the stallion was 9,4 with variation range from 1 to 61 mare daughter. As the sires of registrated mares there were 484 stallions, from which 228 were registrated (20%) and 256 sires were known only by the name (22%). 655 mares (58%) were registrated wihtout known ancestry by father side
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